testa

The protective, often hard outer coat of a seed.

In zoology, a test.

In botany, the outer integument or coat of a seed: it is usually hard and brittle, whence the name, which answers to seed-shell. See seed, 1. Also test, spermoderm, and episperm.

[capitalized] A name of the star Vega.

seed coat

The external calciferous shell, or endoskeleton, of an echinoderm; the test.

protective outer layer of seeds of flowering plants